Electric switch.



)No."asmsa PATENTED JUNE 1.8. 19o-7.

' W. s. MAYBE.

ELECTRIC SWITCH. ArPLIoATvIoN FILED DBYo.12,1`9o6.

Inuemom yUNITED STATES PATENT OFFICE.

WALTER S. MAYER, (,)F PHILADELPHIA, PFNNSYLVAIA, ASHlGNO'R lC Tlflll MACHEN & )IAYFR ELECTRICAL HAN L'FACTURING COMPANY, CF PHILA- `DELPHIA, PENNSYLVANIA, AA CORPORATION CF NEW JERSEY. i

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented June 18, 1907.

Aand closed, or when any other.object is moved from one position to another.

My invention is especially adapted'for usc .in connection with closet or vault doors, in which it is desirable, to have an electric circuit completed upon the opening of the door,

. and Ato .have it interrupted when the door is .tinguished trom closed, or vice versa. y

In my device, the receptacle or well to receive the several operating parts is circular in cross-section, and in this respect is disprevious. constructions, which, so -far as I am aware, have been eitherrectangular or oval in cross-section, necessitating a chiseling operation in the preparation of a seat .in the wall or other ob. ject in which the switch is to be located.

In the use of my invention, a seat can be quickly prepared merely by boring a hole in a wall or other object, by means 'of an auger or similar tool. Y

A convenient embodiment of my invention yis illustrated in the accompanying drawings whichform a part of this specification, and in which Figure 1. is a section of a switch made in accordance with my invent/Qn, the plunger heilig in its most extended posit-ion; Fig. 2 is a section at rightangles to Fig. 1 Fig. 3 is a section similar to Fig. 2, showing the position of the plunger after it has been forced inwardly by a door or by other mea-ns F ig. 4 is a section on the line 4 4 of Fig. 3 Fig. 5

' is a section taken on the line 5 5 of Fig. 2,

portions of the Contact members being broken away; Fig. 6 is a perspective view of 'of each' teriorly of the said casing or receptacleI 1, and the upper ends of which are extended outwardly and over the upper edge of the 'said receptacle or casing 1, as .indicated at to form means for connecting the `yoke to the faceplate 13.r

The casing 1 and the volte member 2 are detachably connected together by means of springs in the form of strips or fingers formed by slitting the material of the casing 1 at two points near to eac-h other. The

vsaid slits are located in couples and one slit of each couple. is shown in Figs. 2 and Il of the drawings. These lingers are pressed to form shoulders 6, which are adapted to engage slots 7 formed in projections 12, extending outwardly from the upper ends of the legs of the yoke 2. These projections and slots are shown most clearly in Fig. 6 oi' the drawings.

1U designates a' cup-shaped plunger', the open end ol' which projects between the legs of the yoke member 2, and it is provided withoutwardly turned projections 1l upon opposite sides which enter elongated slots 14 in the upper end portions of said okeshaped member. 2. The plunger is held normally in an outward position, such as is indicated in Figs. 1 and 2 of the drawings, by

means of a coiled spring 15 shown'in section. in the drawings. The upper end ol the said spring bears against the inner surface of the bottom oi' the plunger while the lower end bears against a cross bar 16 connected to the opposite legs of the `yoke-shaped member Z, by means of screws 17,

18 designates guides secured to the cross bar 16 and extending upwardly therefrom and 19 designates a slide block, the opposite edges of which engage the inner edges ofthe guides 18. The slide block 19`is .rigidly connected to a bar 20, to the lower end. of which a cont-act block 21 is secured, which block is insulated from the said bar 20 by insulating material 22. The crossbar 16 acts as a further means of guiding the movement of the.

slide block 19,.,angithe bar 20.

`Q5 designates an inverted U-shaped niem-4 ber, theupper end of which is connected in any suitable manner to the bottom of the cup-shaped plunger 10.

28 desi natescoiled wire springs, one end; o? which is `-connected to a leg of the' IOO cured to thewyoke member 2 by means of screws 36. The said insulating block' 35 is provided with a central depression or recess, as indicated at in the drawings. 41 designates bindi-ng'posts which are secured -to the insulating block 35, by means of screws 42,

the heads of which are located in countere sinks 43 in the' lower side of the Said insulat` ing block. The lower end of the casing is open, as shown in the drawings, and the,hne

' wires extend upwardly through the bottom of the said casing and through openings in l the insulating block into perforations or holes in the binding posts 41, and such wires are secured in the said binding posts by means of binding screws 46. l

50 designatesa contact member, one end Lof which, as indicated at 51, is located underneath the binding posts and is secured to thel latter, the, other ends 'of which extend inwardly` toward the center of the casing or receptacle 1 to formeontact springs, as is' indicated at 53 inthe drawings. The inner sur faces of theseeontact springs are located opposite each other andslightly nearer together than the transverse width of the contact bloclr- 21, so that when the latter is moved into position betweenIl the said contact springs 53, a close contact is made between the inner surfaces ofthe said springs and the outer opposite surfaces of the said block 21, as is most clearly shown in Fig. 3sat the drawin s. i

gIn the construction as thus far described, the device or switch is'adapted to complete a circuit when a door or other object is closed so'as to push the plunger 10 inwardly, as indicated in Fig. 3.

The operation of my invention is as follows :-Assuming that the plunger 10 and the parts connected thereto areA in the position shown in Figs, 1 and 2 ofthe drawings, if the plunger is moved inwardly7 by pressure or otherwise, the pivotal points of connection.

30 between the wires 28 and the U-shaped member 25 are also moved inwardly so as tol bring thesaid points of connection into aline- `ment with the pivotal points of'connection points of connection 31 areas a result carried i i'ipwardly tofthe' position indicatedin Fig. '3

'of the drawings, In moving the Iplunger l() inwardly to the position indicatediii'Fig 3,

'the spring 15- is compressed. -Whenlv the pressure upon theplunger 10 is removed, the

spring 10, being larger and strongerthan theY .points of connection'31. IIn the movement of-the pivotal points4 of connection v3 0 into aiinement with the points of connection 31, the coiled springs 28 are wound up and placed under tension, but as soon as.the` said-points of connection 30'pass beyond the points of y connection'31, the said wire springs are permittedto unwind, in consequence'of which the points of connection 31- and the slide and contact blocks 19 and 21 are moved suddenly downwardly into the position shown in Fig. 2 of the drawings. 'When the points of connection 31 are moved upwardly into the position shown in Fig. 3 of the drawings, the contact block 21 is carried into position between the contact springs 53, and by reason of the fact that the said springs are slightly closer'together than the transverse width of' the said contact block, the saidlsprings are slightly elevated, as shown in Fig. 3, and in vconsequenceexert a spring action upon the opposite edges or sides vof the said contact block.

In order to limit the upward movement of the contacty block 21, and its connected parts, I have provided a stop 55. If it is desired that'the switch shall o era'te to complete the circuit, so` as to 'lig t a closet or darkroom when the door leading thereinto is opened, it is only necessary to transfer the Contact 'springs 53 from their full line posi-- tions shown in Figs. 2V and 3 to the dotted line positions indicated at J56 in said figures.

When the contact springs are located in the position indicated in dotted lines, it will be seen that the contact block 21 is located between the same and is in contact therewith cated in Fig. 2 and in-whichposition the plunger 10 occupies its outermost or most extended position. c

.Hav-ing thus described my invention, I claim:---l `f y f 1. In a -device ofthe character described,

the combination of a receptacle having movrojecting into the` said receptacle and beingI gagethe said longitudinal slots, and a ten-I sion, member'plocated between the-said I 1 O when it is in` its lowermost position, as indii i plunger and thesaid yoke-shaped member orfthe purpose oi holding the said plunger in an extended or projected position, contact Amembers, supported in the said receptacle and means operatively connected to the said plunger for contacting with the said contact j members, for the purpose set forth.

2.k In a device of the character described,

, the combination ofva member having oppositely arranged slots extending longitudinally of the said member, a bar extending be-A tween the opposite sides of the said member I5 l pthe opposite si es of the said member, a

andconnected to the same,the said bar bemgprovided with' guides extending therefrom, a plunger rojecting inwardly between tension dev-ice.:` located between the said plunger and thesaid member for holding the parts in extended or projected position, a member located interiorly of the said plungerand connected to the same, a contact block, a sliding member engaging the said guides and connected to the said contact block, and coiled/springs connected to the said sliding member and to the saidl member located interiorly of Ithe said plnnger, and contact;` members with-'Which the said block is ada ted to contact.

' 3. lg a device ofthe character described,

' the combination of a member having oppositely arranged slots extending longitudinally ofthe said member, a bar extending between the opposite sides of the said member and.connected to the same, Athe said bar 'being provided with guides extending therefrom, a plunger projecting inwardly between the o posite sides lof the said member,

a'teris'io'n vevice located between the said plunger and the said member for holding the parts in extended or projected position, a

member'located interiorly of the-said plunger and connectedv to the same, a movable contact block, a sliding member engagmg the'said guides, and connected to the said contact. block, coiled springs connected to the said slidingr member and to the saidv member located interiorly of the said plunger, an. insulating block, binding posts secured to vthe said insulating block, and contact springs connected to the said binding posts and adapted to be engaged by the said movable contact block.

4. An electric switch consisting of a casing,

a block of insulating material located therein, a U-shaped strip for holding said block in place, contact s rings secured-'to said block, a slide, means or guiding said slide, a contact block carried bythe slide, a' plunger adapted to slide in the casing, means for normally forcing said lunger'outward, a yke carried by the p unger, two springs connecting said yoke and slide, the said springs being adapted to occasion outward movement of the `slide when the yoke is moved inward, and inward movement' thereof when the yoke is moved outward, thereby making and breaking contact between the contact block and contact springs, as andA Ifor the pur ose set forth.

5. In a evice of the character described, the combination of a tubular casing, a U- shaped strip, secured within said-casing, an insulating l ook secured to said strip, a

bridge bar also secured to said strip, guide posts carried by the bridge bar, a slide guided by said posts, an extension formed ,with the slide, a contact block carried by said extension, contact springs carried by the insulating block, said springs being con- V WALTER s. MAYER, In the dpresence of-.-

S. SLOME BRooKE,. Crans N. ANDERSON. v 

